DoorStop X Firewall
The 2.4 version of DoorStop X Firewall for Mac is provided as a free download on our website. The software lies within Security Tools, more precisely Mac protection. This software for Mac OS X was originally created by Open Door Networks, Inc. This app's bundle is identified as com.opendoor.doorstopx. The application's installer is commonly called DoorStopX2.3.dmg. The most popular versions among DoorStop X Firewall for Mac users are 2.4 and 2.3.
From the developer:
All TCP services protected by default.
You may want to check out more software for Mac, such as WaterRoof, NoobProof or Proxifier, which might be related to DoorStop X Firewall.